Home / 12,815.42-19,213.90-7,874.85

Finding the Fourth Proportional to 12,815.42, 19,213.90 and 7,874.85

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Solution

The fourth proportional to 12,815.42, 19,213.90 and 7,874.85 is: 11,806.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.42 : 19,213.90 = 7,874.85 : x
  2. Step 2: Convert to fraction form
    12,815.42/19,213.90 = 7,874.85/x
  3. Step 3: Cross multiply
    12,815.42x = 19,213.90 × 7,874.85
  4. Step 4: Simplify right side
    12,815.42x = 151,306,590.26
  5. Step 5: Solve for x
    x = 151,306,590.26/12,815.42
  6. Step 6: Final answer
    x = 11,806.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.